<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <script>
      const info = {
        name: "jack",
        age: 20,
        size: {
          w: 100,
          h: 200,
          style: {
            color: "red",
          },
        },
      };
      console.log(info.size);
      console.log(info.size.w);
      console.log(info.size.style.color);
    </script>
  </body>
</html>
